Materials Literature
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A novel composite scaffold comprising a poly(epsilon-caprolactone) (PCL) stent and a type II collagen sponge for tissue-engineered trachea was developed. The PCL stent with surface grooves was fabricated by casting and freeze drying the PCL solution in a mold container. The grooves on the stent were filled by the type…
Acetobacter sp. growing medium was modified in order to produce bacterial cellulose (BC) nanocomposites using a bottom-up technique that allowed starch to be introduced into the cellulose network. The BC-starch mats were hot-pressed to obtain nanocomposites sheets. Morphological characterisation was carried out using…
In this paper, an ultrafine indium tin oxide (ITO) nanoparticle for ink-jet printing was successfully developed by applying low-temperature synthetic method at 300 °C. Mean size of the synthesized ITO nanoparticle is 5 nm with uniformity. High specific surface area above$\hbox{100 m}^{2}\hbox{/g}$certifies the ultrafi…
Nanoparticles of elements such as Au, Al or Ag have optical extinction cross-sections that considerably surpass their geometric cross-sections at certain wavelengths of light. While the absorption and scattering maxima for nanospheres of these elements are relatively insensitive to particle diameter, the surface plasm…
Nickel nanoparticles (Ni NPs) have been applied in a wide range of areas because of their unique structure and properties such as catalysts, high-density magnetic recording media and others. However, little effort has been paid to their biological application and the concrete effect of Ni NPs on biological systems is…
Abstract To understand how alloy chemistry and microstructure impact corrosion performance, oxide layers formed at different stages of corrosion on various model zirconium alloys (Zr-xFe-yCr, Zr-xCu-yMo, for various x, y) and control materials (pure Zr, Zircaloy-4) were examined to determine their structure and the co…
This paper describes a system in which an acid functionalized discotic molecule and poly(propylene-imine) dendrimer self-assemble into a new type of oblique columnar liquid crystalline (LC) phase that displays a well-ordered superlattice. The orthogonal combination of hydrogen bonding in the columnar direction and ion…
We report a new open-framework silicogermanate SU-61 containing 26-ring channels with a low framework density. It can be seen as a crystalline analogue to the mesoporous silica MCM-41. The structure is built from the assembly of (Ge,Si)10(O,OH)28 clusters. It is the first time that silicon has been successfully introd…
A new natural mica/epoxy nanocomposite was formed through the exfoliation of a mica layer. The natural mica used was a potassium sericite (K-SE) whose interlayer was saturated with potassium cations. Powdered samples were separated through an air classifier into D 50 = 13.6 µm (its median particle diameter), D 10 = 7.…
A series of Bi2Te3 nanocomposite samples have been prepared by incorporating nanoparticle concentrations of 5–50mol% into a bulk matrix via a mixing process and subsequently hot pressing into highly densified pellets. The electrical resistivity, thermopower, total thermal conductivity, carrier concentration, and Hall…
Corrosion of copper pipes has been associated with waters with high pH and low alkalinity that also contain significant levels of chloride and sulfate. This study systematically evaluated the effect of pH, alkalinity (or dissolved inorganic carbon [DIC]), orthophosphate, and sulfate on the nature of copper corrosion u…
We used femtosecond transient absorption (TA) spectroscopy to examine the excited state dynamics of single-walled carbon nanotube (SWNT) bundles embedded in polymer matrices. The SWNTs were excited by a femtosecond pump pulse centered at either 1800, 900, or 550 nm and probed using a white-light continuum extending fr…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionCarrier Multiplication and Its Reduction by Photodoping in Colloidal InAs Quantum DotsJ. J. H. Pijpers, E. Hendry, M. T. W. Milder, R. Fanciulli, J. Savolainen, J. L. Herek, D. Vanmaekelbergh, S. Ruhman, D. Mocatta, D. Oron,…
The authors developed the protocol to fabricate transparent single wall carbon nanotube (SWCNT) films on polyethylene terephthalate (PET) film via spin coating of SWCNT-dispersion solution in dichloroethane (DCE). As it turned out, preparation of good SWCNT-dispersion solution was essential for making good transparent…
The objective of this study was to prepare and characterize electrospun SiO2 nanofibers for composite (particularly dental composite) applications. We investigated (1) tetraethyl orthosilicate (TEOS) as the alkoxide precursor, (2) polyethylene oxide (PEO) and polyvinyl pyrrolidone (PVP) as the carrying polymers, (3) s…
Capacitors store electrical charge. Because the charge is stored physically, with no chemical or phase changes taking place, the process is highly reversible and the discharge-charge cycle can be repeated over and over again, virtually without limit. Electrochemical capacitors (ECs), variously referred to by manufactu…
Pharmaceutical hydrates have substantial impact on the bioavailability of drugs, and controlling the formation of hydrates is of significant importance in the pharmaceutical crystallization and formulation processes. The relative stability of carbamazepine anhydrate (CBZA) and dihydrate (CBZD) at room temperature was…
AIMS: To further characterize the clinical signs and symptoms of nephrogenic systemic fibrosis, a new and serious disease affecting renal failure patients and caused by some Gd-containing contrast agents, including gadodiamide. MATERIAL: 22 cases of gadodiamide-related nephrogenic systemic fibrosis followed at the nep…
Recently, a compact solid-state neutron detector capable of simultaneously detecting thermal and fast neutrons was proposed [M. Marinelli et al., Appl. Phys. Lett. 89, 143509 (2006)]. Its design is based on a p-type/intrinsic/metal layered structure obtained by Microwave Plasma Chemical Vapor Deposition (CVD) of homoe…
ZnO nanowire arrays with low defect densities were grown electrochemically. The nanowire morphology was significantly changed when ammonium chloride was added to the source material, and an applied potential up to −1.2 V resulted in a homogeneous distribution of the nanowires, while at −1.4 V, inhomogeneous growth was…